Taxonomic notes on the genus Hyllus C. L. Koch, 1846 in Africa (Araneae: Salticidae)

Transcription

1 Genus Vol. 19(2): Wrocław, 31 VII 2008 Taxonomic notes on the genus Hyllus C. L. Koch, 1846 in Africa (Araneae: Salticidae) Wanda Wesołowska Institute of Zoology, Wrocław University, Sienkiewicza 21, Wrocław, Poland, Abstract. Redescriptions of Hyllus africanus, H. brevitarsis, H. congoensis, H. leucomelas and H. plexippoides are presented. Two specific names are synonymised: H. guineensis with H. africanus and H. normanae with H. treleaveni. Lectotypes for H. africanus and H. congoensis are designated. A fossil genus Parevophrys is considered a junior synonym of Hyllus, new combination is proposed (Hyllus succini ex Parevophrys succini). New faunistic redords are provided. Key words: arachnology, taxonomy, Salticidae, Hyllus, Africa, redescriptions, synonyms, new faunistic records. INTRODUCTION The genus Hyllus C. L. Koch, 1846 contains more than 50 species in Africa and several ones in other continents (Platnick 2008). The majority of African species were described in XIXth and at the beginning of XXth century. Their descriptions are often superficial, devoid of taxonomic drawings, and - as their types have been lost - they cannot be reliably identified any more. The genus requires revision; at the moment it seems to be composed of groups of unrelated species. Distinguishing members of Hyllus and Evarcha Simon, 1902 is especially problematic. Many species in both genera have horns formed by tufts of long bristles located at posterior median eyes. Hyllus includes medium-sized to large spiders with rounded carapace, clearly wider than eye field, whereas members of Evarcha are usually smaller and their carapace is not as wide. Male pedipalp in Hyllus has generally long embolus, often with accompanying pars pendula, whereas the majority of Evarcha species have short embolus, sometimes with compound terminal

2 320 Wanda Wesołowska apophysis. Epigyne in Evarcha has two pockets near epigastric furrow, which are not present in Hyllus, additionally the epigyne in the latter genus is more sclerotized. Both genera clearly demand further studies and complete taxonomic revisions, before a clear picture of their relationships can emerge. This paper provides descriptions of a few African species of Hyllus. The materials that form the foundation of this paper are deposited in the following collections: BMNH - British Museum (Natural History), London MHN - Muséum d Histoire Naturelle, Geneve MCZ - Museum of Comparative Zoology, Harvard University, Cambridge, Mass. MRAC - Musée Royal de l Afrique Centrale, Tervuren NHM - Natural History Museum, Wrocław University MNHN Muséum Nationale d Histoire Naturelle, Paris NMZ - National Museum (Natural History) of Zimbabwe, Bulawayo PPRI - Plant Protection Research Institute, Pretoria SMN - State Museum of Namibia, Windhoek Terminology is standard for Araneae. All measurements are given in millimetres. Genus Parevophrys Petrunkevitch, 1942, syn. n. Taxonomy Genus Hyllus C. L. Koch, 1846 Synonymisation of the generic names As Parevophrys succinea, type species of the monotypic fossil genus Parevophrys Petrunkevitch, 1942 was transferred to the recent genus Hyllus C. L. Koch, 1846, this first generic name is a junior synonym of Hyllus. Hyllus succini (Petrunkevitch, 1942), comb. n. Parevophrys succini Petrunkevitch 1942: 404. The species was described by Petrunkevitch (1942) on the base of adult male from the Baltic amber. The holotype is kept in Sedgwick Museum (Cambridge, England). The specimen is well preserved and the author gives its detailed description and figures. Analysis of this documentation allows one for concluding that the species is closely related to Hyllus congolensis and H. treleaveni, therefore it should be included into the genus Hyllus.

3 Taxonomic notes on the genus Hyllus 321 Hyllus africanus Lessert, 1927 (Figs 1-6) Hyllus africanus Lessert 1927: 449. Hyllus guineensis Berland & Millot 1941: 335, syn. n Hyllus africanus, male, paralectotypes. 1 general appearance, 2, 3 palpal organ, ventral views, 4 - palpal organ, ventrolateral view, 5 - palpal organ, lateral view, 6 tibial apophysis

4 322 Wanda Wesołowska Type material Male (lectotype of H. africanus designated here) CONGO, Poko (MHN, paralectotypes: 5 males). Other material CONGO: Sankuru, Komi, 3 males, leg. J. Ghesquiere (MRAC, ); Kivu, Butembo, 1740 m, 1 male, leg. R. Colis (MRAC, ); same locality, 1 male, IV.1971, leg. R. Lejeune (MRAC, ); Kivu, valee de la Ruindii, 1 male, 3.VII.1972, leg. R. Lejeune (MRAC, ); Tshuapa, Boende, 1 male, X.1969, leg. J. Hauwaert (MRAC, ); Tshuapa, Bananya, 1 male, VII.1970, leg. R. Hulstaert (MRAC, ); Tshuapa, Etata, 2 males, V-VI.1971 (MRAC, ); Inkusu, 1 male, leg. Close (MRAC, 59275); Komi, 1 male, IV.1930, leg. J. Ghesquiere, det. R. Lessert (as H. guineensis) (MRAC, 12152); TANZANIA [Tanganika]: Marambangombe, Lake Rukwa, 3700 m a.l.s., 1 male, IV.1938, leg. E. V. Fuchs, det. D. Clark (as H. marleyi) (BMNH, nr ); ZIMBABWE: Mashonaland, 1 male, leg. G. Darling, det. D. Clark (as H. marleyi) (BMNH). Designation of lectotype One male is designated as lectotype for stabilization of nomenclature. Type specimens differ from each other in size and intensity of coloration. Description Measurements: Carapace length , width height 1.8. Abdomen length , width Eye field length , anterior width , posterior width Male. General appearance in Fig. 1. Cephalothorax rounded, dark brown, its sides with broad light belts, composed of white hairs. Tufts of long brown bristles form horns near eyes of second row. Clypeus low, some white hairs on it. On cheeks, below anterior lateral eyes, three white lines. Sternum and mouth parts dark. Abdomen narrower than carapace, light brown, covered with delicate scutum. Venter yellowish, tinged with grey, with longitudinal wide dark stripe. Spinnerets dark. Legs dark brown. First pair longer and thicker than remaining legs. All legs covered with dark brown long hairs, which are particularly dense on the ventral surface of patella and tibia I. Dark scopulae on tarsi I and II. Claws of all tarsi equal; prolateral with a few teeth, retrolateral with numerous ones. Spines on legs long, dark. Pedipalps brown, some white scales on cymbium. Bulb rounded, with process at base of embolus, embolus long, encircled bulb, with pars pendula (Figs 2-4). Tibial apophysis with three smal teeth on tip (Fig. 6). Distribution Species known from Congo and Guinea, recorded from Tanzania and Zimbabwe for the first time.

5 Taxonomic notes on the genus Hyllus 323 Remarks Type specimen of H. guineensis has not been examined, but the original description and figures in Berland & Millot (1941) are detailed enough to allow one for synonymisation of this specific name with H. africanus. Hyllus brevitarsis Simon, 1902 (Figs 7-26) Hyllus brevitarsis Simon 1902: 391; Clark 1974: 17. Hyllus natali Peckham & Peckham 1903: 210; Strand 1909: 75; Lessert 1925: 495; Caporiacco 1940: 863. Hyllus brevitarsis peckhamorum Berland & Millot 1941: 337. Hyllus rubrotinctus Strand 1906: 665. Type material 3 females, syntypes of H. natali, SOUTH AFRICA, Durban (MCZ, 22248). Other material MOZAMBIQUE: Dondo Forest, 1 male, XII.1960 (BMNH); NAMIBIA: Oshivelo (E from Ethosa NP), 1 female, 8.I.1997, leg. A. Russell-Smith (SMN); SOUTH AF- RICA: Richards Bay, 1 male, 1 female, 2 juv., XI-XII.1995, leg. T. Wassenar (PPRI 97/123); Ndumu NP., 1 female, 6.XII.2000, leg. C. Haddad (PPRI); same locality, 5 males, 27.XII.2000 (PPRI); same locality, 1 female, 29.XI.2000 (PPRI); same locality, 1 female, 6.XII.2000 (PPRI); Transvaal, 2 males, 3 females coll. R. Lessert (MHN): ZIMBABWE: Sibizini Dam, Doddieburn Ranch, 4 males, 1 female, 18.XII,1985, leg. J. Minshull (NMZ A/4143); same locality, 3 males, 11.XII.1985 (NMZ A/4224); same locality, 1 female, 5 juv., 14.XII.1985 (NMZ A/4330); same locality, 1 male, 16.XII.1985 (NMZ A/10969); same locality, 4 males, 13.XII.1985 (NMZ A/4262, 4296); near Doddieburn Ranch, Umzingwane river, 1 male, 11.XII.1985, leg. J. Minshull (NMZ A/4053); Chizarira NP, on Muchene river, Kaswiswi I Camp, S, E, 1 male, 1.XII.2006, leg. D. Cumming (NHM); Hwange NP., Main Camp, 1 male, 4.IX.2005, leg. M. Cumming (NHM); near Harare,1 male, 7.II.2005, leg. A. Huelin (NHM); near Kyle NP., Pesu Gore, S, E, 1 female, 16.XII.1974 (NMZ A/618); Makashi Dam, Bubiana Conservancy Raleigh International, 1 female, 1.XII.1993 (NMZ A/11038); Sibuba Camp, S, E, 1 female, 3.XI.1982, leg. R. Chawanda (NMZ A/1661); Msuna, 1 female, 27.III.1987, leg. L. Kondor (NMZ A/5405); Tsholotsho, 1 male, 1 female, 2003, leg. L. Sibanda (NHM). Description Measurements (male/female): Carapace length / , width / height / Abdomen length / , width 2,3-3.1/ Eye field length / , anterior width / , posterior width / Male. General appearance in Fig. 7. Big spider. Carapace rounded, high in cephalic part. Coloration of carapace brown, eyes with black rings, near eyes a few long brown

6 324 Wanda Wesołowska bristles, in some specimens horns in vicinity of posterior median eyes composed of long bristles. Fovea visible, radiating dark lines from fovea on thoracic part of carapace. Carapace covered with short light hairs, denser hairs on clypeus. Below anterior lateral eyes three parallel strips. Chelicerae brown, their dorsal surfaces with whitish hairs Hyllus brevitarsis, male. 7 general appearance, 8 palpal organ, ventral view, 9 - palpal organ, ventrolateral view, 10 - palpal organ, lateral view, 11 - palpal organ, dorsal view, tibial apophysis

7 Taxonomic notes on the genus Hyllus 325 Gnathocoxae brown with light inner margins, sternum light brown. Abdomen elongated, narrowing posteriorly. Dorsum of abdomen covered with delicate, dark brown, shiny scutum, anterior edge lighter, apodemes well visible. Some thin hairs on abdomen. Venter yellowish grey with darker longitudinal strip. Spinnerets long, brown. Legs long, brown, clothed in long, dense, light and dark hairs. Very long and dense hairs on patellae, tibiae and metatarsi I and II ventrally. Spines long, brown. Tarsal claws as in H. africanus. Pedipalps brown, hairy, some translucent scales on cymbium and tibia. Bulb small, embolus long, encircled twice bulb, with pars pendula wide at the base (Fig. 8). Tibial apophysis short, with serrate tip (Figs 12-17). Female. Bigger than male. Carapace brown, slightly lighter on thoracic part, horns present. Clypeus low, with white hairs. Mouth parts brown, with lighter tips. Sternum brown, with darker margins. Abdomen brownish orange with blackish pattern (Figs Hyllus brevitarsis, female abdominal pattern, 21 - internal structure of epigyne, ventral view, 22 - internal structure of epigyne, dorsal view (Figs 21, 22 from Wesołowska & Cumming 2008)

8 326 Wanda Wesołowska 18-20). Abdominal hairs dense, some hairs - especially sparse white ones - very long. Venter yellow, tinged with grey, darker strip medially. Spinnerets dark. Legs reddish brown, femora and distal ends of other segments darker. Leg hairs long, dark. Spines numerous, brown. Pedipalps light brown. Epigyne large, triangular, with anterior depression (Figs 23-26). Internal structures in Figs 21, 22, seminal ducts very long. Distribution Species widespread in Afrotropical region, for the first time recorded from Mozambique and Namibia Hyllus brevitarsis, female, epigynes

9 Taxonomic notes on the genus Hyllus 327 Hyllus congoensis Lessert, 1927 (Figs 27-36) Hyllus congoensis Lessert 1927: 447; Berland & Millot 1941: 334. Type material Male (lectotype designated here), CONGO, Avakubi, coll. R. Lessert (MHN); paralectotypes: 7 males. Other material CAMEROON: Kounden, 1 male, 1 female, 1 juv., 31.XII.1975, leg. F. Puylaret (MRAC, ); CONGO: Komi, 1 male, leg. J. Guesquiere (MRAC, 11900); same Hyllus congoensis, male, paralectotype. 27 general appearance, 28 palpal organ, ventral view, 29 - palpal organ, ventrolateral view, 30 - palpal organ, lateral view

10 328 Wanda Wesołowska locality, 1 male, 2 females (MRAC, ); same locality, 5 females, 17.IV. 1930, leg. J. Guesquiere, det. C. Roewer (as H. natali) (MRAC, ); Tshuapa, Boende, 1 male, III/IV.1970, leg. J. Hauwaert (MRAC, ); same locality, 1 male, VIII/IX.1970 (MRAC, ); Tshuapa, Etata, 1 female, V-VI.1971, leg. J. Hauwaert (MRAC, ); same locality, 1 male, V/VI.1971 (MRAC, ); SIERRA LEONE: Freetown, Fourach Bay, 1 male, 14.XII.1958, leg. E. White, det. J. Clark (BMNH); same locality, 2 females, 3 juv. (BMNH), Falaba, 1 male, V.1962, leg. R. Shingles (BMNH) Hyllus congoensis, female. 31, 32 - abdominal pattern, ; epigynes, 35 - internal structure of epigyne, ventral view, 36 - internal structure of epigyne, dorsal view

11 Taxonomic notes on the genus Hyllus 329 Designation of lectotype One male is designated as lectotype for stabilization of nomenclature. The species is similar to H. treleaveni, and those two species are often mistaken. Description Measurements (male/female): Carapace length / , width / height / Abdomen length / , width / Eye field length / , anterior width / , posterior width / Male. Medium sized to large spider. General appearance in Fig. 27. Carapace rounded, broadest behind middle. Coloration of carapace dark brown, along its sides two broad streaks formed by white hairs, eyes surrounded black. Fovea sulciform, lines radiate from fovea on thoracic part. Chelicerae big, unidentati, dark brown. Gnathocoxae brownish with pale margins, labium and sternum light brown. Clypeus low, clothed in long white hairs. Scattered delicate hairs on carapace, only in vicinity of eyes hairs numerous. Abdomen slender, narrowing posteriorly, covered with delicate shiny scutum. Short grey hairs on anterior abdominal edge, two pairs of small white patches submarginally (Fig. 27). Venter brown. Spinnerets dark. Legs of first pair stout, hairy. Legs II-IV slightly lighter. Leg hairs and spines brown. Pedipalps shown in Figs Female. Larger than male. Carapace ovoid, rather high, reddish brown with slightly darker slopes and black rings around eyes. Whole carapace densely covered with whitish grey hairs, among them scattered brown bristles, tufts of long bristles near posterior median eyes. Abdomen fawn with median wide lighter belt and one-two pairs of diagonal patches touching it (Figs 31-32). Abdomen densely covered with brown and grey hairs. Venter yellowish, tinged with grey, light chevron-shape patch in front of spinnerets. Spinnerets light brown. Legs generally brown, clothed in brown long hairs. Epigyne with large depression (Figs 33, 34). Internal structure in Figs 35, 36, seminal ducts spirally coiled. Distribution Species known from Congo and Ivory Coast, for the first time recorded in Cameroon and Sierra Leone. Remarks The species is closely related to H. treleaveni, from which is slightly smaller. The male has clearly slenderer abdomen, differs also in abdominal pattern (cf. with Fig. 1 in Wesołowska & Cumming 2004). The bulb in H. congoensis differs in position of posterior lobe (cf. Fig. 28 with Figs 13, 14. in Wesołowska & Cumming 2004). The female may be recognized by abdominal pattern and internal structure of epigyne; H. congoensis has long, spirally coiled seminal ducts, whereas ducts in H. treleaveni are short and straight (cf. Figs 35, 36 with Figs 29, 30 in Wesołowska & Cumming 2004). Hyllus leucomelas (Lucas, 1858) (Figs 37-42) Salticus leucomelas Lucas 1858: 391. Hyllus leucomelas Simon 1887: 262; Lessert 1927: 451; Berland & Millot 1941: 336.

12 330 Wanda Wesołowska Hyllus leucomelas, male, holotype. 37 general appearance, 38 cheliceral dentition, 39 - palpal organ, ventral view, 40 - palpal organ, ventrolateral view, 41 - palpal organ, lateral view, 42 - palpal organ, dorsal view

13 Taxonomic notes on the genus Hyllus 331 Material examined CAMEROON: Kribi, 1 male, 1968/69, leg. J. Bos (MRAC, ); CONGO: Malela, 1 male (+1 additional pedipalp), det. R. Lesseret (MHN). Description Measurements. Carapace length , width height 1.4. Abdomen length , width Eye field length , anterior and posterior width Male. General appearance in Fig. 37. Carapace ovoid, broadest at coxae III, fovea visible. Coloration of carapace brown, eye field covered by colourless hairs, near first row of eyes long bristles. On thoracic area short, dense, white hairs form two triangular patches which extend narrowing onto posterior slope of carapace. Clypeus low, clothed in white hairs. Chelicerae big, robust, with bicuspid tooth on promargin and large tooth on retromargin (Fig. 38). On ventral surface of chelicera a dozen or so parallel furrows (stridulatory apparatus?). Mouth parts brownish fawn with lighter margins, sternum dark brown. Abdomen elongated, narrower than carapace, stripped, with two marginal brown streaks and median whitish streak, posteriorly with pair of small light spots touching median streak. Sides of abdomen light, venter brownish. Long hairs cover abdomen. Spinnerets brown. Legs light brown, long. Spines numerous, very long. Leg hairs long, brown. Pedipalps with broad retrolateral apophysis and second small apophysis at base of tibia (Figs 39-42). Bulb rounded, embolus short. Large dorsal process at base of cymbium (Fig. 39). Distribution Species hitherto known only from Senegal, recorded in Cameroon and Congo for the first time. Remarks Taxonomic position of this species is uncertain, its relationships with other Hyllus doubtful. Hyllus plexippoides Simon, 1906 (Figs 43-48) Hyllus plexippoides Simon 1906: 1175; Clark 1974: 18; Prószyński 1984: 66. Viciria lawrencei Lessert 1927: 458; Berland & Millot 1941: 382. Material examined IVORY COAST, Man, 2 males, VIII.1937, leg. J. Millot, (MNHN), PNB(?) 3 males, 2 females (MNHN); ZAMBIA, Hillwood Farm, 1 male, 25.IX.1990, leg. D. G. Broadley (NMZ A/8733). Description Measurements (male/female): Carapace length / , width / height / Abdomen length /3.9/5.56, width /

14 332 Wanda Wesołowska Hyllus plexippoides, male and female general appearance of male, 44 - palpal organ, ventral view, 45 - palpal organ, lateral view, 46 - palpal organ, dorsal view, 47 epigyne, 48 internal structure of epigyne

15 Taxonomic notes on the genus Hyllus 333 Eye field length /1.7, anterior width / , posterior width / Male. Medium sized spider. General appearance as in Fig. 43. Carapace oval, dark brown with blackish rings surrounding eyes, foveal area lighter. Two belts composed of white hairs run along sides of thoracic part. Tufts of long bristles form horns near posterior median eyes. Long white hairs cover clypeus. Chelicerae and labium brown, gnathocoxae brown with yellowish inner margins, sternum yellow. Abdomen elongated, narrow, dark brown with median whitish streak. Thin, long hairs cover abdomen, at anterior edge dense brown bristles. Venter yellowish with median broad dark streak. Spinnerets grey. Legs I robust, brown. Remaining legs yellowish with brown rings on femora distally. Leg hairs long, brown, spines long. Pedipalps thin, tibial apophysis straight, very long (Figs 44-46). Bulb rounded, at base of embolus some small teeth (Figs 44, 45). Female. Similar to male, but first pair of leg shorter and coloration slightly lighter. Epigyne with large triangular depression (Fig. 47). Internal structure as in Fig. 48. Distribution Hitherto species known from Egypt, Ivory Coast and Congo, for the first time recorded from Zambia. Remarks The species resembles members of Hyllus in habitus, but structure of genital organs is unlike; therefore, taxonomic position of this species is uncertain. Hyllus treleaveni Peckham et Peckham, 1902 Hyllus treleaveni Peckham & Peckham 1902: 334. Hyllus normanae Wanless et Clark 1975: 280, syn. n. Type material Female, hototype of H. normanae, IVORY COAST, Bingeville, VIII.1961, leg. J. Decelle, (MRAC, ). Remarks For redescription of this species and its synonyms see Wesołowska & Cumming (2004). References Berland, L., Millot, J., Les araignees de l Afrique occidentale francaise. Mem. Mus. nat. Hist. nat., 12 (2): Caporiacco, L. di., Aracnidi raccolte nella Reg. dei Laghi Etiopici della Fossa Galla. Atti Real. Accad. Ital., 11: Clark, D. J.,1974. Notes on Simon s types of African Salticidae. Bull. Br. arachnol. Soc., 3: Lessert, R. de., Araignées du Kilimandjaro et du Merou (suite). 5. Salticidae. Rev. suisse zool., 31:

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